Locking nut assembly for a guitar



FIG. 1 is a top, front and right side perspective view of a locking nut assembly for a guitar showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof; and

FIG. 6 is a right side elevational view, the left side being a mirror image. 

The ornamental design for locking nut assembly for a guitar, as shown and described. 